How to make custom MKPolyline in SWIFT with additional argument - color

Question

Can any help me with making custom MKPolyline with additional argument Color?

CustomPolyline.swift

import Foundation
im         


        

Answer 1

As user3470987 pointed out, there might be an issue in modifying the default 'rendererForOverlay' delegate function. It could also prove difficult if you'd like to add overlays of other types than MKPolyline.

Class

import Foundation
import MapKit

class Polyline: MKPolyline {
    var color: UIColor?
}

Render function

func mapView(_ mapView: MKMapView, rendererFor overlay: MKOverlay) -> MKOverlayRenderer {

    if let polyline = overlay as? Polyline {

        let polylineRenderer = MKPolylineRenderer(overlay: polyline)
        polylineRenderer.strokeColor = polyline.color
        polylineRenderer.lineWidth = 3
        return polylineRenderer
    }

    return MKOverlayRenderer(overlay: overlay)

}